Dropbox began rolling out some new features to its web site today, including the ability to preview documents and new photo sorting and sharing tools.

Now, when you double-click on a PDF, DOC, DOCX, or PPT file, you'll see a preview of that file before you download it, so you don't need to leave your browser (spreadsheets are not yet supported). More interesting though is Dropbox's new "Camera" section. When you log in, click "Camera" in the left sidebar and you'll see an interface Android users are quite familiar with: it shows you all the photos you've uploaded from your phone(s), grouped by date. You can group them into their own individual albums and email them or post them to Facebook and Twitter right from this interface. Your albums will stay intact even if you move those photos to a different folder in your Dropbox.

Dropbox says these features are going to roll out gradually over the next month or so, so if you don't see the new features yet, keep an eye out—you should soon.